A heavyweight fight between Fabricio Werdum (11-4-1) and late replacement Mike Kyle (12-6-1) has been promoted to the Showtime-televised main card of Saturday’s “Strikeforce: Carano vs. Cyborg” event.

The move, first reported by AOL Fanhouse, now means at least five fights will be broadcast from Saturday’s event.

“Strikeforce: Carano vs. Cyborg,” which features a main event of Gina Carano vs. Cristiane “Cyborg” Santos for Strikeforce’s first-ever 145-pound women’s title, takes place at the HP Pavilion in San Jose, Calif.

The Werdum vs. Kyle matchup was booked earlier this month. Werdum was originally expected to fight Strikeforce heavyweight champion Alistair Overeem at Saturday’s event, but the title-holder (who hasn’t defended his title since winning it in November 2007) was forced off the card with a hand injury.

Although initially expected to be on the un-aired preliminary card, the Werdum vs. Kyle heavyweight bout was moved to the main card following the cancellation of a title fight between Nick Diaz and Jay Hieron. Diaz skipped a drug test and wasn’t allowed to compete at the show, Jesse Taylor replaced Diaz, and the fight was changed to a three-round non-title fight, which gave the extra time needed to move Werdum vs. Kyle to the main card.

Werdum, a four-time UFC veteran, last fought in a first-round TKO loss to Junior dos Santos at UFC 90 in October 2008. Werdum had figured to factor into the UFC’s heavyweight title picture after he rebounded from a loss to Andrei Arlovski in his octagon debut with back-to-back wins over Brandon Vera and Gabriel Gonzaga. However, the organization surprisingly elected to release the Brazilian following the loss to dos Santos.

Kyle, meanwhile, recently returned from a near-year-long layoff at Strikeforce’s June show. There, the WEC and UFC veteran stunned the St. Louis crowd with a second-round TKO over highly touted prospect Rafael “Feijao” Cavalcante, a former EliteXC fighter expected to contend for Strikeforce’s light-heavyweight title.

As a reminder, MMAjunkie.com (www.mmajunkie.com) will be on scene for today’s weigh-ins and tomorrow’s full event. We’ll have full round-by-round updates and official results from Saturday’s preliminary and main cards beginning at approximately 8:30 p.m. ET (5:30 p.m. PT).

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